The TEPEE (Towards a European Portfolio for Environmental Education) network developed a mechanism that enabled educators to evaluate and certificate environmental education competencies. The project team defined a scale of descriptors of abilities and competencies and the most appropriate methods and instruments of evaluation to develop a system of accreditation based on formative evaluation.

More information about the TEPEE network can be found in the paper ‘Portfolios in Environmental Education: The TEPEE project, which can be accessed here